The AJ Bell London Triathlon welcomed more than 13,000 competitors – ranging from 18 to 74 years old – to the Excel centre.
The largest event of its kind, taking place over Saturday, August 8 and Sunday, August 9, saw elite triathletes, keen amateurs, celebrities, fundraisers and first-timers from 50 countries come together to sweat it out.
There were a few injuries in the cycling race and a handful of people had to be brought in on the safety boats during the swim, but overall the day went well.
The celebrities took on the course on the first day of the event, with The Only Way Is Essex star Lydia Bright taking on the running leg in the sprint relay and Gadget Show presenter Jason Bradbury participating in a team relay with celebrity magician Max Somerset.
TV presenter Charlie Webster returned to the event this year after taking part in the challenge in 2013 – which was her first triathlon – coming fresh from an Ironman.
She said: “It’s been so amazing to be here again because this was my first ever triathlon.
“Last time I was here I had only just learnt to swim so it’s been great to be back and take on the course for the second time.
“The atmosphere and support was incredible and really helped spur me on, I would really recommend it to anyone wanting to take on a triathlon for the first time.”
Taking on team-relays on behalf of Panathlon Challenge were a Paralympic team made up of swimmer and triple Paralympic medallist Liz Johnson, London 2012 wheelchair rugby captain Steve Brown and 2008 Paralympic gold medallist Danny Crates.
On the day, Danny said: “Last year when I competed in the event it was my introduction to the world of triathlon and I was absolutely blown away so it’s great to be back and taking part again.”
The elites went head-to-head with Olympian and twice World Champion Helen Jenkins and Australian triathlete Peter Kerr coming out champions on the day.
Speaking of her victory, Helen said: “It’s been a tough few months and I had a bad result in Rio last weekend so it’s fantastic to be back and to have had such a great race.
“I had a bit of aggression to get out, but me and Charlotte worked really well together; we played to our strengths, kept our heads down and it paid off.
“I didn’t feel great in the swim, but pulled through on the bike and run and it felt amazing to finish how I did.”
Peter said: “It’s my first time here, but I’ve absolutely loved the event. The crowd were spectacular and there were loads of Aussie chants as I went round the course so the whole experience has been great for my confidence.
“I was really happy with how the race went; I was hoping to be in the front pack in the swim and was in second for a long portion, but played cat and mouse with Liam Lloyd and managed to catch back up.”
There was also an 88-strong senior elite field, that included Charlotte McShane, Gillian Sanders and Emma Pallant in the female race and Lloyd, David Bishop and Brendan Sexton in the male elite category.